There are multiple definitions:

1. Tufts Medical Center(English)

   • in Boston, USA
   • BWH, HMS, MGH
   • Hospital

2. N-trimethyl chitosan(English)

   • used as cationic material to prepare tetrandrine lipid nanoparticles
   • AD, CMC, HPC, HupA, Lf, Lf-TMC, MD, NP, PLGA, TET-LNP
   • Ophthalmology, Nano-sciences, Alzheimer's disease
   • https://doi.org…phs.2020.09.010
   • https://doi.org…147/IJN.S151474
   • https://doi.org…/acsami.5b03555

3. titanium mesh cage(English)

   • may refer to 3D-printed artificial vertebral body
   • ACCF, DEXA, HU, MRI, VBQ
   • Spine (or spinal cord), Surgery
   • https://doi.org/10.1111/os.13931